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E85 / E86 Z4 (2003-2008)
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Old 05-13-2010, 06:28 PM
hummarz hummarz is offline
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Location: IRVINE, CA
Join Date: Mar 2007
Posts: 26
Mein Auto: 2004 Z4 3.0
Z4 aftermarket stereo install, oem stock amp help

I have taken my 04 Z4 into the stereo shop yesterday to get the Clarion NZ500 with Ipod video adaptor cable installed and the installer is having a hard time getting the stock amp to turn on. I have searched and searched many forums and have gotten conflicted answers. If anyone can help, it would be much appreciated. I have the 10 speaker system with the cd player. I do have dsp controls like jazz and concert. The installer as taken the stock stereo out and there is no digital fiber optic (or digital cable) going to the factory amp, but he cant seem to get the amp to turn on. Is there anyway to get the stock amp to turn on as I dont want to spend more money on another amp and install. The factory sound setup is good enough for me, just want to be able to watch movies and have nav in my car.

Thanks in advance...
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Old 05-17-2010, 09:51 PM
hummarz hummarz is offline
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Location: IRVINE, CA
Join Date: Mar 2007
Posts: 26
Mein Auto: 2004 Z4 3.0
So I just found out that if you have a 8-pin out for your speakers, then you can use the aftermarket stereo with the stock amp, but if you have a 4-pin out, then you cannot. Since the 4-pin uses the k-bus data line. I have talked to a local installer here and said he can do it, but he said the minimum on the install would be $200. So I just spent the $200 on an Arc mini 4 channel amp (125.4) with installation. Sounds better then oem.
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Old 04-20-2011, 11:24 AM
WillEckrich WillEckrich is offline
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Location: Harrogate, England
Join Date: Apr 2011
Posts: 1
Mein Auto: 2003 BMW Z4
hummarz, thx for the info... can you tell me where you picked up the Arc mini 4 channel amp (125.4)? I don't know much about car audio and just today found out that the Clarion CZ-500 won't work with the 2003 BMW Z4 that I recently purchased... lol

in your experience and/or the experience of fellow readers, should i go for the Arc mini 4 channel amp or purchase a head unit that has an 8-pin out for the speakers (if they make such a thing)?

thx all in advance for the help!

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Old 04-20-2011, 01:01 PM
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papitosabe papitosabe is offline
Location: Houston
Join Date: Apr 2007
Posts: 313
Mein Auto: 06 Z4 Coupe
there are 2 diff set up ...you have to find the thread...either hear or bimmerforums... quite detailed actually.... 1 is where the guy used the bmw stereo and had to put it in the trunk, rewired the new stereo to it, and no new amp was needed... the other one talked about how to do the wiring with a new amp... do a different searches for aftermarket stereo and stereo..

**edit**not sure if this is the same issue I had because of the ohms being different than normal...

Last edited by papitosabe; 04-20-2011 at 03:32 PM.
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